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Why Does My ATV Engine Pop When I Give It Throttle?
The ATV AnswerMan digs into a 2001 Arctic Cat 400
Why does my ATV engine pop when I give it throttle? This is the beginning of a very detailed question one of our readers asked the ATV AnswerMan.
Here is exactly what reader Jayson asked the Answerman (it is long and extremely detailed), followed by his answer:
I have a 2001 arctic cat 400 manual shift. The problem, The machine will start fine and idle like it should, once you get into the throttle it will start to misfire and back pop but will not die even if you hold the throttle, it just pops.
What I’ve done,
Last summer I began to have battery charging issues, my dad, who was the original owner of the bike, came over we started looking into fuses and wiring connectors and YouTubed the symptoms. What we learned was the voltage regulator could be bad so we purchased a “universal” for a certain amount of years arctic cats, mine falling in the category. The battery began charging correctly and everything seemed to run fine, appropriate voltage back and such. A short time later it began to run rough, so I assumed it was a fuel issue which, is what it seemed like and also we had done nothing to the carb other than drain it every year in the 10+ years we’ve had it. The carb was fairly clean a few chunks of stuff were in it but I’ve seen worse that runs better. I then put the carb back on after a thorough cleaning and installing a inline filter and had the same problem. I began searching just about every forum on the web and found a guy that had the wrong or bad voltage regulator that was sending to much power to the battery if he’d turn on the headlights it drew enough power to run fine. I figured quite a long shot but what the hell. I put the meter back on it and I was getting almost seventeen volts back, which was not the case when we first installed it. With the headlights on it drew down to almost perfect voltage, 14-14.6. It seemed to run great with the lights on which led me to believe the “universal” regulator we had bought which was much cheaper than others was the wrong one for my bike, we don’t have the receipt and I can’t get much help from who we bought it through to get it returned so I said screw it and ran the bike doing things around the yard like pull the harrow with the lights on until I could afford a full priced regulator. After three or four times of riding it it has begun to run like garbage again.
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